Ordered another set of injector o-rings and pintle caps from him a couple weeks ago. There was a slight mixup and the wrong pintle caps got sent to me by mistake. I sent a email and within 10 min I had a reply and the correct caps were in the mail! He said dont worry about sending the wrong ones back. He even threw in some free injector filters for the trouble.
Great customer service and he will always get my business for fuel injector parts!